2 * Linux ARCnet driver - COM20020 chipset support
4 * Written 1997 by David Woodhouse.
5 * Written 1994-1999 by Avery Pennarun.
6 * Written 1999 by Martin Mares <mj@ucw.cz>.
7 * Derived from skeleton.c by Donald Becker.
9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
10 * for sponsoring the further development of this driver.
12 * **********************
14 * The original copyright of skeleton.c was as follows:
16 * skeleton.c Written 1993 by Donald Becker.
17 * Copyright 1993 United States Government as represented by the
18 * Director, National Security Agency. This software may only be used
19 * and distributed according to the terms of the GNU General Public License as
20 * modified by SRC, incorporated herein by reference.
22 * **********************
24 * For more details, see drivers/net/arcnet.c
26 * **********************
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/types.h>
31 #include <linux/ioport.h>
32 #include <linux/errno.h>
33 #include <linux/delay.h>
34 #include <linux/netdevice.h>
35 #include <linux/init.h>
36 #include <linux/interrupt.h>
37 #include <linux/arcdevice.h>
38 #include <linux/com20020.h>
42 #define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n"
44 static char *clockrates
[] = {
45 "XXXXXXX", "XXXXXXXX", "XXXXXX",
46 "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",
47 "156.25 Kb/s", "Reserved", "Reserved", "Reserved"
50 static void com20020_command(struct net_device
*dev
, int command
);
51 static int com20020_status(struct net_device
*dev
);
52 static void com20020_setmask(struct net_device
*dev
, int mask
);
53 static int com20020_reset(struct net_device
*dev
, int really_reset
);
54 static void com20020_copy_to_card(struct net_device
*dev
, int bufnum
,
55 int offset
, void *buf
, int count
);
56 static void com20020_copy_from_card(struct net_device
*dev
, int bufnum
,
57 int offset
, void *buf
, int count
);
58 static void com20020_set_mc_list(struct net_device
*dev
);
59 static void com20020_close(struct net_device
*);
61 static void com20020_copy_from_card(struct net_device
*dev
, int bufnum
,
62 int offset
, void *buf
, int count
)
64 int ioaddr
= dev
->base_addr
, ofs
= 512 * bufnum
+ offset
;
66 /* set up the address register */
67 outb((ofs
>> 8) | RDDATAflag
| AUTOINCflag
, _ADDR_HI
);
68 outb(ofs
& 0xff, _ADDR_LO
);
71 TIME("insb", count
, insb(_MEMDATA
, buf
, count
));
74 static void com20020_copy_to_card(struct net_device
*dev
, int bufnum
,
75 int offset
, void *buf
, int count
)
77 int ioaddr
= dev
->base_addr
, ofs
= 512 * bufnum
+ offset
;
79 /* set up the address register */
80 outb((ofs
>> 8) | AUTOINCflag
, _ADDR_HI
);
81 outb(ofs
& 0xff, _ADDR_LO
);
84 TIME("outsb", count
, outsb(_MEMDATA
, buf
, count
));
87 /* Reset the card and check some basic stuff during the detection stage. */
88 int com20020_check(struct net_device
*dev
)
90 int ioaddr
= dev
->base_addr
, status
;
91 struct arcnet_local
*lp
= netdev_priv(dev
);
96 lp
->setup
= lp
->clockm
? 0 : (lp
->clockp
<< 1);
97 lp
->setup2
= (lp
->clockm
<< 4) | 8;
99 /* CHECK: should we do this for SOHARD cards ? */
100 /* Enable P1Mode for backplane mode */
101 lp
->setup
= lp
->setup
| P1MODE
;
103 SET_SUBADR(SUB_SETUP1
);
104 outb(lp
->setup
, _XREG
);
106 if (lp
->clockm
!= 0) {
107 SET_SUBADR(SUB_SETUP2
);
108 outb(lp
->setup2
, _XREG
);
110 /* must now write the magic "restart operation" command */
112 outb(0x18, _COMMAND
);
115 lp
->config
= 0x21 | (lp
->timeout
<< 3) | (lp
->backplane
<< 2);
116 /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
118 outb(0x42, ioaddr
+ BUS_ALIGN
* 7);
122 if ((status
& 0x99) != (NORXflag
| TXFREEflag
| RESETflag
)) {
123 BUGMSG(D_NORMAL
, "status invalid (%Xh).\n", status
);
126 BUGMSG(D_INIT_REASONS
, "status after reset: %X\n", status
);
130 outb(inb(ioaddr
+ BUS_ALIGN
* 8), ioaddr
+ BUS_ALIGN
* 7);
132 ACOMMAND(CFLAGScmd
| RESETclear
| CONFIGclear
);
135 BUGMSG(D_INIT_REASONS
, "status after reset acknowledged: %X\n",
138 /* Read first location of memory */
139 outb(0 | RDDATAflag
| AUTOINCflag
, _ADDR_HI
);
142 if ((status
= inb(_MEMDATA
)) != TESTvalue
) {
143 BUGMSG(D_NORMAL
, "Signature byte not found (%02Xh != D1h).\n",
150 static int com20020_set_hwaddr(struct net_device
*dev
, void *addr
)
152 int ioaddr
= dev
->base_addr
;
153 struct arcnet_local
*lp
= netdev_priv(dev
);
154 struct sockaddr
*hwaddr
= addr
;
156 memcpy(dev
->dev_addr
, hwaddr
->sa_data
, 1);
157 SET_SUBADR(SUB_NODE
);
158 outb(dev
->dev_addr
[0], _XREG
);
163 const struct net_device_ops com20020_netdev_ops
= {
164 .ndo_open
= arcnet_open
,
165 .ndo_stop
= arcnet_close
,
166 .ndo_start_xmit
= arcnet_send_packet
,
167 .ndo_tx_timeout
= arcnet_timeout
,
168 .ndo_set_mac_address
= com20020_set_hwaddr
,
169 .ndo_set_rx_mode
= com20020_set_mc_list
,
172 /* Set up the struct net_device associated with this card. Called after
175 int com20020_found(struct net_device
*dev
, int shared
)
177 struct arcnet_local
*lp
;
178 int ioaddr
= dev
->base_addr
;
180 /* Initialize the rest of the device structure. */
182 lp
= netdev_priv(dev
);
184 lp
->hw
.owner
= THIS_MODULE
;
185 lp
->hw
.command
= com20020_command
;
186 lp
->hw
.status
= com20020_status
;
187 lp
->hw
.intmask
= com20020_setmask
;
188 lp
->hw
.reset
= com20020_reset
;
189 lp
->hw
.copy_to_card
= com20020_copy_to_card
;
190 lp
->hw
.copy_from_card
= com20020_copy_from_card
;
191 lp
->hw
.close
= com20020_close
;
193 if (!dev
->dev_addr
[0])
194 dev
->dev_addr
[0] = inb(ioaddr
+ BUS_ALIGN
* 8); /* FIXME: do this some other way! */
196 SET_SUBADR(SUB_SETUP1
);
197 outb(lp
->setup
, _XREG
);
199 if (lp
->card_flags
& ARC_CAN_10MBIT
) {
200 SET_SUBADR(SUB_SETUP2
);
201 outb(lp
->setup2
, _XREG
);
203 /* must now write the magic "restart operation" command */
205 outb(0x18, _COMMAND
);
208 lp
->config
= 0x20 | (lp
->timeout
<< 3) | (lp
->backplane
<< 2) | 1;
209 /* Default 0x38 + register: Node ID */
211 outb(dev
->dev_addr
[0], _XREG
);
213 /* reserve the irq */
214 if (request_irq(dev
->irq
, arcnet_interrupt
, shared
,
215 "arcnet (COM20020)", dev
)) {
216 BUGMSG(D_NORMAL
, "Can't get IRQ %d!\n", dev
->irq
);
220 dev
->base_addr
= ioaddr
;
222 BUGMSG(D_NORMAL
, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
223 lp
->card_name
, dev
->dev_addr
[0], dev
->base_addr
, dev
->irq
);
226 BUGMSG(D_NORMAL
, "Using backplane mode.\n");
228 if (lp
->timeout
!= 3)
229 BUGMSG(D_NORMAL
, "Using extended timeout value of %d.\n", lp
->timeout
);
231 BUGMSG(D_NORMAL
, "Using CKP %d - data rate %s.\n",
233 clockrates
[3 - ((lp
->setup2
& 0xF0) >> 4) + ((lp
->setup
& 0x0F) >> 1)]);
235 if (register_netdev(dev
)) {
236 free_irq(dev
->irq
, dev
);
243 * Do a hardware reset on the card, and set up necessary registers.
245 * This should be called as little as possible, because it disrupts the
246 * token on the network (causes a RECON) and requires a significant delay.
248 * However, it does make sure the card is in a defined state.
250 static int com20020_reset(struct net_device
*dev
, int really_reset
)
252 struct arcnet_local
*lp
= netdev_priv(dev
);
253 u_int ioaddr
= dev
->base_addr
;
256 BUGMSG(D_DEBUG
, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
257 __FILE__
, __LINE__
, __func__
, dev
, lp
, dev
->name
);
258 BUGMSG(D_INIT
, "Resetting %s (status=%02Xh)\n",
259 dev
->name
, ASTATUS());
261 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
262 lp
->config
= TXENcfg
| (lp
->timeout
<< 3) | (lp
->backplane
<< 2);
263 /* power-up defaults */
265 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
270 mdelay(RESETtime
* 2); /* COM20020 seems to be slower sometimes */
272 /* clear flags & end reset */
273 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
274 ACOMMAND(CFLAGScmd
| RESETclear
| CONFIGclear
);
276 /* verify that the ARCnet signature byte is present */
277 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
279 com20020_copy_from_card(dev
, 0, 0, &inbyte
, 1);
280 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
281 if (inbyte
!= TESTvalue
) {
282 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
283 BUGMSG(D_NORMAL
, "reset failed: TESTvalue not present.\n");
286 /* enable extended (512-byte) packets */
287 ACOMMAND(CONFIGcmd
| EXTconf
);
288 BUGMSG(D_DEBUG
, "%s: %d: %s\n", __FILE__
, __LINE__
, __func__
);
290 /* done! return success. */
294 static void com20020_setmask(struct net_device
*dev
, int mask
)
296 u_int ioaddr
= dev
->base_addr
;
298 BUGMSG(D_DURING
, "Setting mask to %x at %x\n", mask
, ioaddr
);
302 static void com20020_command(struct net_device
*dev
, int cmd
)
304 u_int ioaddr
= dev
->base_addr
;
309 static int com20020_status(struct net_device
*dev
)
311 u_int ioaddr
= dev
->base_addr
;
313 return ASTATUS() + (ADIAGSTATUS() << 8);
316 static void com20020_close(struct net_device
*dev
)
318 struct arcnet_local
*lp
= netdev_priv(dev
);
319 int ioaddr
= dev
->base_addr
;
321 /* disable transmitter */
322 lp
->config
&= ~TXENcfg
;
326 /* Set or clear the multicast filter for this adaptor.
327 * num_addrs == -1 Promiscuous mode, receive all packets
328 * num_addrs == 0 Normal mode, clear multicast list
329 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
330 * best-effort filtering.
331 * FIXME - do multicast stuff, not just promiscuous.
333 static void com20020_set_mc_list(struct net_device
*dev
)
335 struct arcnet_local
*lp
= netdev_priv(dev
);
336 int ioaddr
= dev
->base_addr
;
338 if ((dev
->flags
& IFF_PROMISC
) && (dev
->flags
& IFF_UP
)) { /* Enable promiscuous mode */
339 if (!(lp
->setup
& PROMISCset
))
340 BUGMSG(D_NORMAL
, "Setting promiscuous flag...\n");
341 SET_SUBADR(SUB_SETUP1
);
342 lp
->setup
|= PROMISCset
;
343 outb(lp
->setup
, _XREG
);
345 /* Disable promiscuous mode, use normal mode */
347 if ((lp
->setup
& PROMISCset
))
348 BUGMSG(D_NORMAL
, "Resetting promiscuous flag...\n");
349 SET_SUBADR(SUB_SETUP1
);
350 lp
->setup
&= ~PROMISCset
;
351 outb(lp
->setup
, _XREG
);
355 #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
356 defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
357 defined(CONFIG_ARCNET_COM20020_CS_MODULE)
358 EXPORT_SYMBOL(com20020_check
);
359 EXPORT_SYMBOL(com20020_found
);
360 EXPORT_SYMBOL(com20020_netdev_ops
);
363 MODULE_LICENSE("GPL");
367 static int __init
com20020_module_init(void)
369 BUGLVL(D_NORMAL
) printk(VERSION
);
373 static void __exit
com20020_module_exit(void)
376 module_init(com20020_module_init
);
377 module_exit(com20020_module_exit
);